Open-hearth furnace



V. B. BROWNE.

OPEN HEABTH FURNACE.

APPLICATION F|LED.|UNE28 1919- RENEWED AUG- 8, 1921- gm mg; r I Patentedm M9 mm.

2 SHEETS-SHEET l.

WITNESSES V. B. BROWNE.

OPEN HEARTH FURNACE.

APPLICATION FILE-D JUNE 28. 1919- RENEWED AUG. 8.1921.

Lg Patented 001:. H, W21

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specification of Letters Patent.

Patented tlct. ill, T921.

Application flled tune'tt, W19, Nerlal No. 307,469. Nenewed August a,1921. Serial No. M0309.

' I To all whom it may concern."

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Be it known that T, Venn B. Browne, a citizen of the United States, anda resident of Tarentum in the county of Allegheny and State of fennsylvania have made a new and useful lnvention in dpen-lfllearthFurnaces, of which the following is a specification. a

This invention relates to improvements in open hearth furnaces and hasas an object the provision of certain new arrangements whereby powderedfuel (such as powdered coal) may be used with a material decrease in theclogging of the checkers over that occurrin in the present arrangements.

A. further object is the provision of a furnace of the above type inwhich the checker work is located entirely above the ground level thusenabling relatively easy repairs and renewals.

These, as well as other obfects which will readily appear to those skiled in this particular art ll attain in the furnace described in thespecification and illustrated in the drawings accompanying and forming apart of this application.

In the drawings, Figure 1 is a longitudinal vertical section of afurnace embodying this invention and Fig. 2 is a longitudinal horizontalsection taken at a point just above the hearth.

.The furnace consists of a hearth 3 of.

ordinary construction supported on the foundation 4 andprovided with aroof 5. A checker work regenerator 6 connects with one end of the hearthby means of flue 7 of novel construction while a checker workregenerator 8 connects with the other end of the hearth by means of aflue 9 of similar novel construction.

Powdered fuel, such as powdered coal, is forced into the combustionchamber above the hearth through ports or nozzles 10 (preferably watercooled) of suitable size and number and which are positioned so as todischarge the fuel at the proper angle into the combustion chamber. K

Each of the flues 7 and 9 is constructed with a central wall 11 having aort 12 extending therethrough. The wal thus. converts each flue into anup and down-take having a connecting port. The space below the bottom ofthe port is a dead air space and serves to collect the ash and othersolid matter carried through the flue toward the checker brick with theproducts of combustion. Each of the separate chambers of the separatoris provided with tracks 13 for slag cars 14. x

The checker work will merely be used to regenerate the air and ifdesired each end of the furnace may be provided with an extra checkerWork 15 in order to serve as a spare regenerator. If it becomesnecessary to clean out or repair one of the main regenerators withoutstopping the operation of the furnace this may be done by opening upport 16 which connects spare regenerator 15 with .one of the flues 7 or9 and when this is done opening 17 will be closed as shown at 18, Flg.2. The furnace is provided with a suitable stack 19, valves 20 and 21and dampers 20*, 20 and 20 for reversing the operation of theregenerators.

Each regenerator is provided with a cleaning door indicated by circle 22and since these are located above the ground level 23 the checker workmay be repaired or renewed from time to time without dismantling theentire regenerators as is now customary.

The products of combustion passing through the flue to the regeneratorin striking the partition between the up and downtake has its directionchanged and the solids tend to fall down along the partition wall to thedead air space at the bottom of the down-take. Tn crossing through theport 12 to the up-take the direction is again changed and the solidsimpinging on the far wall of the up-take tend to fall down along saidwall to the dead air space at the bottom of the up-take. The flue withits central partition, which serves as a baflie, acts in the nature of aseparator. The solids and heavy particles contained in the gases fallinto the dead air spaces and the effective efiicient life of theregenerators is increased over those now in use. The terms up anddown-take as just used apply to each flue when it is being utilized toconvey the products of combustion to a regenerator. When these flues areused for conveying heated air from the regenerator to the hearth or tothe combustion chamber above the hearth the portions of the flue ofcourse will be reversed and what before was the down-take becomes theuptake, etc.

In accordance with the provisions of the patent statutes T havedescribed the principle of the operation ofrny invention, to-

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llllll ltlll llllh gether with the device which I now consider torepresent the best embodiment thereof, but I desire to have itunderstood that the device shown is only illustrative and that theinvention can be carried out in other wa s.

aving thus described my invention what I claim is- 1. The combinationwith a hearth. of regenerators arranged to be alternately utilized andcentral walls each provided with a through port to form separatorsbetween said hearth and said regen'erators.

2. The combination with a hearth, of regenerators arranged to bealternately utilized and separators between said hearth and saidregenerators each having an up and down-take formed by a central wallbafile provided with a through port.

3. The combination with a hearth of a regenerator arranged at each endof said hearth, an additional regenerator located adjacent one of thefirst-mentioned regenerators, and a central wall to form a pair ofseparating chambers between each regenerator and the hearth.

4. The combination with ahearth, of regenerators arranged to bealternately utilized and located above the ground level and a separatorbetween said hearth and each regenerator provided with two dead airpockets.

5. The combination with a furnace hearth, of regenerators arranged to bealternately utilized, separators arranged between said- VERE B. BaowNE.

the roof thereof and at an inclina-

